, california. >> look at those pearly whites. >>> we're joined by greta monahan. thanks for coming. you brought examples. >> these foods are naturally abrasive. becky touched on apples and core rats and celery. all of the raw vegetables, they scrub your teeth. think of them as nature's toothbrush. >> and you will see a difference? >> absolutely. they scrub away and work while you're eating. >> why would we have red wine in a whitening segment? >> it's one of the biggest culprits next to coffee. one of the things she was talking about is hard cheese. milk and dairy products have lactic acid, lara. like a skin peel, they exfoliate your teeth. dairy products being, if you eat a piece of cheese before, you're protecting the red wine. but also on the milk, add it to your coffee and it protects the protective film on your teeth so it's loose for staining. >> that's a great tip. these are the blockers. >> and the green leafy, is also, not many people realize. but kale, broccoli, base basil, contains a film on the teeth. >> normally, when you say film on the teeth. >> it sounds nasty. >> but this is a
